took the oil injection offf never messed with carb running like crap need to use choke to start it. runs better with choke on back fires thru carb idles real rough anything any suggs please help 2002 trailblazer

 

You probably have an air leak. When you took off the oil injection, did you plug the hole where your oil line went into your carb. The oil was injected into the carb. If you did away with the oil injection, I bet you left that hole open. If so, air would be sucked into their and be causing your machine to be real lean. Plug it before you blow it up.